BlogEngine on GoDaddy

I installed BlogEngine 2.0 in the default folder in my hosting account on GoDaddy. I went into the GoDaddy file management and changed the permissions for App_Data to read. Then when I go to login from the blog page (using admin/admin). I get a message "login
failed". I'm not sure what else I should be doing.

FYI - this is my first attempt at setting something like this up. THANKS.